<div class="row ">
  <x-row space="1">
    <x-col span="8">
      <x-card shadow="always">
        总是显示
      </x-card>
    </x-col>
    <x-col span="8">
      <x-card shadow="hover">
        鼠标悬浮时显示
      </x-card>
    </x-col>
    <x-col span="8">
      <x-card shadow="never">
        从不显示
      </x-card>
    </x-col>
  </x-row>
</div>
